[test] refactor tests

masque/test/test_manhattanize.py

@@ -0,0 +1,17 @@
+import pytest
+import numpy
+
+from ..shapes import Polygon
+
+
+def test_manhattanize() -> None:
+    pytest.importorskip("float_raster")
+    pytest.importorskip("skimage.measure")
+    poly = Polygon([[0, 5], [5, 10], [10, 5], [5, 0]])
+    grid = numpy.arange(0, 11, 1)
+
+    manhattan_polys = poly.manhattanize(grid, grid)
+    assert len(manhattan_polys) >= 1
+    for mp in manhattan_polys:
+        dv = numpy.diff(mp.vertices, axis=0)
+        assert numpy.all((dv[:, 0] == 0) | (dv[:, 1] == 0))